Watching the performance of cryptocurrency exchanges reveals the stability of the platform as well as the underlying scaling capacity of the cryptocurrencies they trade. Bittrex and Bithumb were also impacted when Bitcoin took its last precipitous fall, clogging transactions, hindering trades and showing security cracks that left them vulnerable to DDoS attacks.

Bitfinex tweeted on November 26 that it was under a DDoS attack during maintenance.

Bitfinex is under DDoS attack. The DDoS attack started during earlier maintenance and has been ongoing since.